Milk cooler



Aug. 21, 192s. 1,681,539

W. L. HOLT MILK COOLER Filed July 20. 1927 A TTORNE Y.

Cil

500 F., the nearer 4001 F., thebetter. The Y r sloping surface.

Patented Aug. 21, 1928.

UNIT-.ED 'STATES PATfENTpoFFicpE.

WILLIAM LELAND IOL'l, OF SCARBORO, MAINE.

i ivriLir COOLER; i

.ippica-e011 inea myst, i927.- seriai No. 207,203.

greatv majority ofsinalll dairymen do'not cool their milk below sixty because,"tliey kcannot atlord, or Will not buy aneliicient milk cooler, which prior to my invention cost at least a hundred dollars.v rlhey nearly all use the old-fashioned conical milkcooler,

in Which you put about fifty pounds' ot' cracked ice with tlireekto tive pails ot'well Water, the hot milk floivs through many small holes in the edge ot the upper chamber and 'flows in a thiniilmover the ,cold Now, 1 the Whole trouble with this old style cooler is that no means oiE keeping the ice-Water Well stirred is provided, only a long straight rod With a disc fastened to the end at right angles, which the dairynian is advised to stand and pull up and down all the time the milk is flowing over the cooler.` Naturally, hardly any dairyinan will give the time to pull "this stirring rod back and forth for tivo or three minutes every time he pours the milk 'from each coiv into his cooler'. vThen he does keep it going and has plenty of ice, he cools his milk to an average of 500 to F., but When he doesnt stir it, in 90% of the times,

he cools it only to (380 to 70o F., or even` Worse, ask I have repeatedly observed With a tested thermometer at dairies and at home.

The object ot my invention is toY Vperfect the simple, conical milk cooler noiv on'tlie market, and a further object of my invention is to provide poi'ver operated agitators` for milk coolers, whereby l am enabled to cool milk down to the ideal temperature ci 42o F., to 45o kF.; and with theseV and other objects in View, my invention consists of the parts and combination oi' parts as will be hereinafter more fully set out.

The figure of the drawing illustrated in 'my invention is a vertical sectional view through a milk cooler. The reference nuL moral 1 designates a truncated-cone shaped by means of the blocks, or straps 15.

ice ,v and Water kchamber upony which is mounted a milk receiving receptacle Q, said vmilk receiving receptacle fhaving openings?) through which the milk passes and iioivs/on the outer face of the iceand Water chamber l 'whereby it is cooled to the yproper degree.

Suitable bracese are secured Within the chamber l, abovethe Water line, and siipport at their center a.y bearing 5 in which the upper end of the shaft G' is'l journalled, the lower end ot tlie'sha'lit 'being journalled in a suitable bearing 7. at the bottom of the chamber." This Vshaft 6 is provided with a bevel or other suitable gear Wheel 8` ivhich meshes with the bevel' pinion 9, which, in turn, is keyed to the shaft' 10, `which shaft is mounted in suitable bearingsllf, there bei ing a stop 12 mounted' on the shaft to limit its endivise"movement The shaft lOfi's shown as being provided AWith ay belt pulley 13, but, of course, it is understoodfthat the shaft may, byfsuitablevgear, connected direct-ly with asource ot' poi'ver.

@n the shait, and Within lthe ice'and Water chamber l I secure agitator blades 14.- The agitator blades le are spaced from each other and connected at their ends by braces' 16 whereby the outer ends of" the agitator blades are pressed and held in yproper relation one With the other.

Vithin the chamber 1I provide an overflow pipe 17, the top of which is slightly above the predetermined water line ot the chamber, while the lower end of the pipe 17 extends to a point outside of the chamber. l also provide the water chamber ,with a metallic sleeve 18 secured in a suitable open ing in rthe Wall oit the chamber, the lower end oit which projects a predetermined distance Within the ice and Water chamber,l and is perforated as at 19 to permit of the tree flow oi theLWater in the chamber through the lower end portion of the sleeve. Within this sleeve Isecure a thermometer Q0 which passes through a water-tight stopper in the sleeve 18, and can beread through the ivindon7 formed in one tace of the sleeve lS whereby the dairyman can at a glance ascertain the temperature of the Water in the chamber l. This thermometer sleeve is so disposed Within the chamber l that it does not interfere with the putting oi ice in the chamber7 and the'sleeve protects the therw mometer troni vbeingbroken by coming in Contact Avvitirh'gthe'ice' the eharnber As will be seen 'from the Vdrfnvingftlie sleeve 18 is positioned at a steep angle relative tothe:- v l y the icooler, and tunless stirred this Warm vertical axis olrtlieehamb'er lrthereby still further eliminating liability of damage to tlie sleeve by the movement of ice iiitlie chamber.

My improved iee cooler has,`by actual eX- perienee, been .fpundto be ejIiieientVsimple in opeetoe y eoneniel in @perni-i011, @ed will ,reguiifej little,` or v.no attention ,froml the The value of the :aggift-atorl isthat usual amount ofice `an'dyvat'er I feancoolV milk down to a temperature of 429 Ffto 459 F. IWithoutthe, 11.56.01: brine or ammonia v refrigeration, v,and to :aecoinpllislh this 'the ,l appreciate that :changes may be inade vin the details ,oeonst'ruetion withing the v spirit of my liznventinli, and l"Without Ideparting from the scope. of the; appendedfol'aim.

The reason why my revolving agitator 'improves'f'tlie cooling about 25Fxis as folloWs'Theh'ot milk rapidly heats a blanket onlm of Water next to the inner surfaceof Waterrr keeps the metal sides of Cooler much Warmer than the ice-Water, which is thus rendered v.iiieiiieient The agitator blades,

hoivever, tear thiswarmlayer of Water away as fastasit is formed,v byea/using a circulation of, ell 'the Water in the eooler, Winch also carries' the'ice lumpswi'th' In milk cololerfa truncated'coneshaped ieandivater eliainbenfainilk reeeiv'i'ng re-l face ofsai'd chamber, a power operated agitator mounted AWithin'and' neai5v the 'bottom of said Heliamber,y an yover-How port at the pre# determined .Water leveldiseliarging outside of ythe chamber, a `lthermometer vCasing extending intovsaid eliambertofa point below the predetermined Water level an d provided with a `perforated endfportion to permit entrance ofthe Wateninftlie Chamber, the o uteif endv` ,of the easing!entendingy l`f ib()`ve"the Water level of, the Chamber; ,and a therinoin-l eter seCured insaid easing.'

In testimony Whereo `lnaiix nature. y

Y IWILLIAM LELAND HQLT, D. f' 

